TY - GEN
T1 - Enabling photon counting clinical x-ray CT
AU - Taguchi, Katsuyuki
AU - Srivastava, Somesh
AU - Kudo, Hiroyuki
AU - Barber, William C.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Photon counting x-ray detectors (PCXDs) with energy discrimination capabilities offer various advantages over the current intensity integrating detectors, such as improved accuracy in material decomposition, reduced image noise, reduced radiation dose, etc. The major problem of PCXDs, however, is the limited speed. The required count rate for clinical x-ray CT scanners may be 109 counts-per-second-per-square-millimeters (cps), while the operational count rates (where a count rate loss is less than 5%) of available PCXDs are much lower, e.g., 5 × 105 cps. In this study, we propose to enable PCXD-based clinical CT imaging using these slower-than-desired detectors by a combination of four methods that reduce the count rate requirements and compensate for the effect of pileup.
AB - Photon counting x-ray detectors (PCXDs) with energy discrimination capabilities offer various advantages over the current intensity integrating detectors, such as improved accuracy in material decomposition, reduced image noise, reduced radiation dose, etc. The major problem of PCXDs, however, is the limited speed. The required count rate for clinical x-ray CT scanners may be 109 counts-per-second-per-square-millimeters (cps), while the operational count rates (where a count rate loss is less than 5%) of available PCXDs are much lower, e.g., 5 × 105 cps. In this study, we propose to enable PCXD-based clinical CT imaging using these slower-than-desired detectors by a combination of four methods that reduce the count rate requirements and compensate for the effect of pileup.
KW - Computed tomography
KW - Photon counting
UR - http://www.scopus.com/inward/record.url?scp=77951153554&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77951153554&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2009.5401823
DO - 10.1109/NSSMIC.2009.5401823
M3 - Conference contribution
AN - SCOPUS:77951153554
SN - 9781424439621
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 3581
EP - 3585
BT - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
T2 - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
Y2 - 25 October 2009 through 31 October 2009
ER -